Swamp of Ancient Illnesses

({t}: Add {b})
Swamp of Ancient Illnesses enters the battlefield tapped.
{b}{b}{b},{t}, exile Swamp of Ancient Illnesses:
Each player loses a third of their life, then
discards a third of the cards in their hand, then
sacrifices a third of the creatures they control,
then sacrifices a third of the lands they control.
Round up each time. End the turn. Activate this
ability only on your turn.